Hi,
You have to publish some address custom fields in the HikaShop backend (display > custom field) in order to have the "address_company" and the "address_vat" available in the address.
At this moment, you (and your customers) will be able to fill these fields and HikaShop will be able to determine in which customer type the address is.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.